Home / 15,294.87-21,106.98-8,580.78

Finding the Fourth Proportional to 15,294.87, 21,106.98 and 8,580.78

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Solution

The fourth proportional to 15,294.87, 21,106.98 and 8,580.78 is: 11,841.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,294.87 : 21,106.98 = 8,580.78 : x
  2. Step 2: Convert to fraction form
    15,294.87/21,106.98 = 8,580.78/x
  3. Step 3: Cross multiply
    15,294.87x = 21,106.98 × 8,580.78
  4. Step 4: Simplify right side
    15,294.87x = 181,114,351.84
  5. Step 5: Solve for x
    x = 181,114,351.84/15,294.87
  6. Step 6: Final answer
    x = 11,841.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.